diff --git a/app/build.gradle b/app/build.gradle
index 772d671..9e4d154 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -61,7 +61,4 @@ dependencies {
 }
 repositories {
     mavenCentral()
-}
-configurations {
-    all*.exclude group: 'com.google.guava', module:'listenablefuture'
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/github/chronosx88/influence/contracts/CoreContracts.kt b/app/src/main/java/io/github/chronosx88/influence/contracts/CoreContracts.kt
index 3a2c099..4764bad 100644
--- a/app/src/main/java/io/github/chronosx88/influence/contracts/CoreContracts.kt
+++ b/app/src/main/java/io/github/chronosx88/influence/contracts/CoreContracts.kt
@@ -54,7 +54,10 @@ interface CoreContracts {
         fun onDestroy()
     }
 
-    interface IMainViewContract//
+    interface IMainViewContract {
+        fun showSnackbar(message: String)
+        fun showProgressBar(state: Boolean)
+    }
 
     // -----ChatActivity-----
 
diff --git a/app/src/main/java/io/github/chronosx88/influence/presenters/MainPresenter.java b/app/src/main/java/io/github/chronosx88/influence/presenters/MainPresenter.java
deleted file mode 100644
index 82797d4..0000000
--- a/app/src/main/java/io/github/chronosx88/influence/presenters/MainPresenter.java
+++ /dev/null
@@ -1,24 +0,0 @@
-package io.github.chronosx88.influence.presenters;
-
-import io.github.chronosx88.influence.contracts.CoreContracts;
-import io.github.chronosx88.influence.logic.MainLogic;
-
-public class MainPresenter implements CoreContracts.IMainPresenterContract {
-    private CoreContracts.IMainLogicContract logic;
-    private CoreContracts.IMainViewContract view;
-
-    public MainPresenter(CoreContracts.IMainViewContract view) {
-        this.view = view;
-        logic = new MainLogic();
-    }
-
-    @Override
-    public void initPeer() {
-        logic.initPeer();
-    }
-
-    @Override
-    public void onDestroy() {
-        logic.shutdownPeer();
-    }
-}
diff --git a/app/src/main/java/io/github/chronosx88/influence/presenters/MainPresenter.kt b/app/src/main/java/io/github/chronosx88/influence/presenters/MainPresenter.kt
new file mode 100644
index 0000000..73ab727
--- /dev/null
+++ b/app/src/main/java/io/github/chronosx88/influence/presenters/MainPresenter.kt
@@ -0,0 +1,23 @@
+package io.github.chronosx88.influence.presenters
+
+import io.github.chronosx88.influence.R
+import io.github.chronosx88.influence.contracts.CoreContracts
+import io.github.chronosx88.influence.helpers.AppHelper
+import io.github.chronosx88.influence.logic.MainLogic
+
+class MainPresenter(private val view: CoreContracts.IMainViewContract) : CoreContracts.IMainPresenterContract {
+    private val logic: CoreContracts.IMainLogicContract = MainLogic()
+
+    override fun initPeer() {
+        if (AppHelper.getPeerDHT() == null) {
+            logic.initPeer()
+        } else {
+            view.showSnackbar(AppHelper.getContext().getString(R.string.node_already_running))
+            view.showProgressBar(false)
+        }
+    }
+
+    override fun onDestroy() {
+        logic.shutdownPeer()
+    }
+}
diff --git a/app/src/main/java/io/github/chronosx88/influence/views/MainActivity.java b/app/src/main/java/io/github/chronosx88/influence/views/MainActivity.java
index 006dfa9..90db9f3 100644
--- a/app/src/main/java/io/github/chronosx88/influence/views/MainActivity.java
+++ b/app/src/main/java/io/github/chronosx88/influence/views/MainActivity.java
@@ -2,16 +2,23 @@ package io.github.chronosx88.influence.views;
 
 import android.app.ProgressDialog;
 import android.os.Bundle;
+import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
 import android.widget.Toast;
 
 import com.google.android.material.bottomnavigation.BottomNavigationView;
+import com.google.android.material.snackbar.Snackbar;
 import com.google.gson.JsonObject;
 
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentTransaction;
+
+import org.jetbrains.annotations.NotNull;
+
 import io.github.chronosx88.influence.R;
 import io.github.chronosx88.influence.contracts.CoreContracts;
 import io.github.chronosx88.influence.contracts.observer.IObserver;
@@ -130,4 +137,47 @@ public class MainActivity extends AppCompatActivity implements IObserver, CoreCo
             }
         }
     }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.main_actionbar_menu, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        if(item.getItemId() == R.id.action_reconnect_network) {
+            progressDialog.show();
+            presenter.initPeer();
+        }
+        return true;
+    }
+
+    @Override
+    public void showSnackbar(@NotNull String message) {
+        Snackbar.make(getRootView(), message, Snackbar.LENGTH_LONG)
+                .show();
+    }
+
+    @Override
+    public void showProgressBar(boolean state) {
+        if(state) {
+            progressDialog.show();
+        } else {
+            progressDialog.dismiss();
+        }
+    }
+
+    private View getRootView() {
+        final ViewGroup contentViewGroup = findViewById(android.R.id.content);
+        View rootView = null;
+
+        if(contentViewGroup != null)
+            rootView = contentViewGroup.getChildAt(0);
+
+        if(rootView == null)
+            rootView = getWindow().getDecorView().getRootView();
+
+        return rootView;
+    }
 }
diff --git a/app/src/main/res/drawable/ic_autorenew_white_24dp.xml b/app/src/main/res/drawable/ic_autorenew_white_24dp.xml
new file mode 100644
index 0000000..a23db6d
--- /dev/null
+++ b/app/src/main/res/drawable/ic_autorenew_white_24dp.xml
@@ -0,0 +1,22 @@
+<!--
+  ~ Copyright (C) 2019 ChronosX88
+  ~
+  ~ This program is free software: you can redistribute it and/or modify
+  ~ it under the terms of the GNU General Public License as published by
+  ~ the Free Software Foundation, either version 3 of the License, or
+  ~ (at your option) any later version.
+  ~
+  ~ This program is distributed in the hope that it will be useful,
+  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~ GNU General Public License for more details.
+  ~
+  ~ You should have received a copy of the GNU General Public License
+  ~ along with this program. If not, see <https://www.gnu.org/licenses/>.
+  -->
+
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M12,6v3l4,-4 -4,-4v3c-4.42,0 -8,3.58 -8,8 0,1.57 0.46,3.03 1.24,4.26L6.7,14.8c-0.45,-0.83 -0.7,-1.79 -0.7,-2.8 0,-3.31 2.69,-6 6,-6zM18.76,7.74L17.3,9.2c0.44,0.84 0.7,1.79 0.7,2.8 0,3.31 -2.69,6 -6,6v-3l-4,4 4,4v-3c4.42,0 8,-3.58 8,-8 0,-1.57 -0.46,-3.03 -1.24,-4.26z"/>
+</vector>
diff --git a/app/src/main/res/menu/main_actionbar_menu.xml b/app/src/main/res/menu/main_actionbar_menu.xml
new file mode 100644
index 0000000..eb81b5b
--- /dev/null
+++ b/app/src/main/res/menu/main_actionbar_menu.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2019 ChronosX88
+  ~
+  ~ This program is free software: you can redistribute it and/or modify
+  ~ it under the terms of the GNU General Public License as published by
+  ~ the Free Software Foundation, either version 3 of the License, or
+  ~ (at your option) any later version.
+  ~
+  ~ This program is distributed in the hope that it will be useful,
+  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~ GNU General Public License for more details.
+  ~
+  ~ You should have received a copy of the GNU General Public License
+  ~ along with this program. If not, see <https://www.gnu.org/licenses/>.
+  -->
+
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/action_reconnect_network"
+        app:showAsAction="always"
+        android:icon="@drawable/ic_autorenew_white_24dp"
+        android:title="@string/reconnect_network"/>
+</menu>
\ No newline at end of file
diff --git a/app/src/main/res/values-ru-rRU/strings.xml b/app/src/main/res/values-ru-rRU/strings.xml
index 05dbfe9..2e0fb2e 100644
--- a/app/src/main/res/values-ru-rRU/strings.xml
+++ b/app/src/main/res/values-ru-rRU/strings.xml
@@ -7,4 +7,6 @@
     <string name="cancel">Отмена</string>
     <string name="username_settings">Ваше имя пользователя</string>
     <string name="username_hint">Имя пользователя</string>
+    <string name="reconnect_network">Переподключиться к сети</string>
+    <string name="node_already_running">Узел уже запущен</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 2594e0b..cae914e 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -6,4 +6,6 @@
     <string name="cancel">Cancel</string>
     <string name="username_settings">Your username</string>
     <string name="username_hint">Username</string>
+    <string name="reconnect_network">Reconnect to the network</string>
+    <string name="node_already_running">Node already running</string>
 </resources>